She'll play Vivian, a beautiful, free-spirited traveler who shows up on Walden's (Kutcher) doorstep. Though he's set to propose to someone else, Walden gets thrown for a loop when he meets Vivian and becomes convinced she's "the one."

Kunis and Kutcher previously starred together on the sitcom That '70s Show. Are you looking forward to seeing her on Two and a Half Men?